summaryrefslogtreecommitdiff
path: root/src/device/oprom/yabel/vbe.c
blob: 219ef914966dce8acf6d8431fd6622d7dd69b2f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
/******************************************************************************
 * Copyright (c) 2004, 2008 IBM Corporation
 * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer
 *   in the documentation and/or other materials provided with the
 *   distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Contributors:
 *     IBM Corporation - initial implementation
 *****************************************************************************/

#include <string.h>
#include <types.h>
#if CONFIG_FRAMEBUFFER_SET_VESA_MODE
#include <boot/coreboot_tables.h>
#endif

#include <endian.h>

#include "debug.h"

#include <x86emu/x86emu.h>
#include <x86emu/regs.h>
#include "../x86emu/prim_ops.h"

#include "biosemu.h"
#include "io.h"
#include "mem.h"
#include "interrupt.h"
#include "device.h"

#include <cbfs.h>

#include <delay.h>
#include "../../src/lib/jpeg.h"

#include <vbe.h>

// pointer to VBEInfoBuffer, set by vbe_prepare
u8 *vbe_info_buffer = 0;

// virtual BIOS Memory
u8 *biosmem;
u32 biosmem_size;

#if CONFIG_FRAMEBUFFER_SET_VESA_MODE
static inline u8
vbe_prepare(void)
{
	vbe_info_buffer = biosmem + (VBE_SEGMENT << 4);	// segment:offset off VBE Data Area
	//clear buffer
	memset(vbe_info_buffer, 0, 512);
	//set VbeSignature to "VBE2" to indicate VBE 2.0+ request
	vbe_info_buffer[0] = 'V';
	vbe_info_buffer[0] = 'B';
	vbe_info_buffer[0] = 'E';
	vbe_info_buffer[0] = '2';
	// ES:DI store pointer to buffer in virtual mem see vbe_info_buffer above...
	M.x86.R_EDI = 0x0;
	M.x86.R_ES = VBE_SEGMENT;

	return 0;		// successfull init
}

// VBE Function 00h
static u8
vbe_info(vbe_info_t * info)
{
	vbe_prepare();
	// call VBE function 00h (Info Function)
	M.x86.R_EAX = 0x4f00;

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE("%s: VBE Info Function NOT supported! AL=%x\n",
				 __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Info Function Return Code NOT OK! AH=%x\n",
		     __func__, M.x86.R_AH);
		return M.x86.R_AH;
	}
	//printf("VBE Info Dump:");
	//dump(vbe_info_buffer, 64);

	//offset 0: signature
	info->signature[0] = vbe_info_buffer[0];
	info->signature[1] = vbe_info_buffer[1];
	info->signature[2] = vbe_info_buffer[2];
	info->signature[3] = vbe_info_buffer[3];

	// offset 4: 16bit le containing VbeVersion
	info->version = in16le(vbe_info_buffer + 4);

	// offset 6: 32bit le containing segment:offset of OEM String in virtual Mem.
	info->oem_string_ptr =
	    biosmem + ((in16le(vbe_info_buffer + 8) << 4) +
		       in16le(vbe_info_buffer + 6));

	// offset 10: 32bit le capabilities
	info->capabilities = in32le(vbe_info_buffer + 10);

	// offset 14: 32 bit le containing segment:offset of supported video mode table
	u16 *video_mode_ptr;
	video_mode_ptr =
	    (u16 *) (biosmem +
			  ((in16le(vbe_info_buffer + 16) << 4) +
			   in16le(vbe_info_buffer + 14)));
	u32 i = 0;
	do {
		info->video_mode_list[i] = in16le(video_mode_ptr + i);
		i++;
	}
	while ((i <
		(sizeof(info->video_mode_list) /
		 sizeof(info->video_mode_list[0])))
	       && (info->video_mode_list[i - 1] != 0xFFFF));

	//offset 18: 16bit le total memory in 64KB blocks
	info->total_memory = in16le(vbe_info_buffer + 18);

	return 0;
}

static int mode_info_valid;

int vbe_mode_info_valid(void)
{
	return mode_info_valid;
}

// VBE Function 01h
static u8
vbe_get_mode_info(vbe_mode_info_t * mode_info)
{
	vbe_prepare();
	// call VBE function 01h (Return VBE Mode Info Function)
	M.x86.R_EAX = 0x4f01;
	M.x86.R_CX = mode_info->video_mode;

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Return Mode Info Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Return Mode Info (mode: %04x) Function Return Code NOT OK! AH=%02x\n",
		     __func__, mode_info->video_mode, M.x86.R_AH);
		return M.x86.R_AH;
	}

	//pointer to mode_info_block is in ES:DI
	memcpy(mode_info->mode_info_block,
	       biosmem + ((M.x86.R_ES << 4) + M.x86.R_DI),
	       sizeof(mode_info->mode_info_block));
	mode_info_valid = 1;

	//printf("Mode Info Dump:");
	//dump(mode_info_block, 64);

	return 0;
}

// VBE Function 02h
static u8
vbe_set_mode(vbe_mode_info_t * mode_info)
{
	vbe_prepare();
	// call VBE function 02h (Set VBE Mode Function)
	M.x86.R_EAX = 0x4f02;
	M.x86.R_BX = mode_info->video_mode;
	M.x86.R_BX |= 0x4000;	// set bit 14 to request linear framebuffer mode
	M.x86.R_BX &= 0x7FFF;	// clear bit 15 to request clearing of framebuffer

	DEBUG_PRINTF_VBE("%s: setting mode: 0x%04x\n", __func__,
			 M.x86.R_BX);

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Mode Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: mode: %x VBE Set Mode Function Return Code NOT OK! AH=%x\n",
		     __func__, mode_info->video_mode, M.x86.R_AH);
		return M.x86.R_AH;
	}
	return 0;
}

#if 0
//VBE Function 08h
static u8
vbe_set_palette_format(u8 format)
{
	vbe_prepare();
	// call VBE function 09h (Set/Get Palette Data Function)
	M.x86.R_EAX = 0x4f08;
	M.x86.R_BL = 0x00;	// set format
	M.x86.R_BH = format;

	DEBUG_PRINTF_VBE("%s: setting palette format: %d\n", __func__,
			 format);

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Format Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Format Function Return Code NOT OK! AH=%x\n",
		     __func__, M.x86.R_AH);
		return M.x86.R_AH;
	}
	return 0;
}

// VBE Function 09h
static u8
vbe_set_color(u16 color_number, u32 color_value)
{
	vbe_prepare();
	// call VBE function 09h (Set/Get Palette Data Function)
	M.x86.R_EAX = 0x4f09;
	M.x86.R_BL = 0x00;	// set color
	M.x86.R_CX = 0x01;	// set only one entry
	M.x86.R_DX = color_number;
	// ES:DI is address where color_value is stored, we store it at 2000:0000
	M.x86.R_ES = 0x2000;
	M.x86.R_DI = 0x0;

	// store color value at ES:DI
	out32le(biosmem + (M.x86.R_ES << 4) + M.x86.R_DI, color_value);

	DEBUG_PRINTF_VBE("%s: setting color #%x: 0x%04x\n", __func__,
			 color_number, color_value);

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Function Return Code NOT OK! AH=%x\n",
		     __func__, M.x86.R_AH);
		return M.x86.R_AH;
	}
	return 0;
}

static u8
vbe_get_color(u16 color_number, u32 * color_value)
{
	vbe_prepare();
	// call VBE function 09h (Set/Get Palette Data Function)
	M.x86.R_EAX = 0x4f09;
	M.x86.R_BL = 0x00;	// get color
	M.x86.R_CX = 0x01;	// get only one entry
	M.x86.R_DX = color_number;
	// ES:DI is address where color_value is stored, we store it at 2000:0000
	M.x86.R_ES = 0x2000;
	M.x86.R_DI = 0x0;

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Set Palette Function Return Code NOT OK! AH=%x\n",
		     __func__, M.x86.R_AH);
		return M.x86.R_AH;
	}
	// read color value from ES:DI
	*color_value = in32le(biosmem + (M.x86.R_ES << 4) + M.x86.R_DI);

	DEBUG_PRINTF_VBE("%s: getting color #%x --> 0x%04x\n", __func__,
			 color_number, *color_value);

	return 0;
}

// VBE Function 15h
static u8
vbe_get_ddc_info(vbe_ddc_info_t * ddc_info)
{
	vbe_prepare();
	// call VBE function 15h (DDC Info Function)
	M.x86.R_EAX = 0x4f15;
	M.x86.R_BL = 0x00;	// get DDC Info
	M.x86.R_CX = ddc_info->port_number;
	M.x86.R_ES = 0x0;
	M.x86.R_DI = 0x0;

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Get DDC Info Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: port: %x VBE Get DDC Info Function Return Code NOT OK! AH=%x\n",
		     __func__, ddc_info->port_number, M.x86.R_AH);
		return M.x86.R_AH;
	}
	// BH = approx. time in seconds to transfer one EDID block
	ddc_info->edid_transfer_time = M.x86.R_BH;
	// BL = DDC Level
	ddc_info->ddc_level = M.x86.R_BL;

	vbe_prepare();
	// call VBE function 15h (DDC Info Function)
	M.x86.R_EAX = 0x4f15;
	M.x86.R_BL = 0x01;	// read EDID
	M.x86.R_CX = ddc_info->port_number;
	M.x86.R_DX = 0x0;	// block number
	// ES:DI is address where EDID is stored, we store it at 2000:0000
	M.x86.R_ES = 0x2000;
	M.x86.R_DI = 0x0;

	// enable trace
	CHECK_DBG(DEBUG_TRACE_X86EMU) {
		X86EMU_trace_on();
	}
	// run VESA Interrupt
	runInt10();

	if (M.x86.R_AL != 0x4f) {
		DEBUG_PRINTF_VBE
		    ("%s: VBE Read EDID Function NOT supported! AL=%x\n",
		     __func__, M.x86.R_AL);
		return -1;
	}

	if (M.x86.R_AH != 0x0) {
		DEBUG_PRINTF_VBE
		    ("%s: port: %x VBE Read EDID Function Return Code NOT OK! AH=%x\n",
		     __func__, ddc_info->port_number, M.x86.R_AH);
		return M.x86.R_AH;
	}

	memcpy(ddc_info->edid_block_zero,
	       biosmem + (M.x86.R_ES << 4) + M.x86.R_DI,
	       sizeof(ddc_info->edid_block_zero));

	return 0;
}

static u32
vbe_get_info(void)
{
	u8 rval;
	int i;

	// XXX FIXME these need to be filled with sane values

	// get a copy of input struct...
	screen_info_input_t input;
	// output is pointer to the address passed as argv[4]
	screen_info_t local_output;
	screen_info_t *output = &local_output;
	// zero input
	memset(&input, 0, sizeof(screen_info_input_t));
	// zero output
	memset(&output, 0, sizeof(screen_info_t));

	vbe_info_t info;
	rval = vbe_info(&info);
	if (rval != 0)
		return rval;

	DEBUG_PRINTF_VBE("VbeSignature: %s\n", info.signature);
	DEBUG_PRINTF_VBE("VbeVersion: 0x%04x\n", info.version);
	DEBUG_PRINTF_VBE("OemString: %s\n", info.oem_string_ptr);
	DEBUG_PRINTF_VBE("Capabilities:\n");
	DEBUG_PRINTF_VBE("\tDAC: %s\n",
			 (info.capabilities & 0x1) ==
			 0 ? "fixed 6bit" : "switchable 6/8bit");
	DEBUG_PRINTF_VBE("\tVGA: %s\n",
			 (info.capabilities & 0x2) ==
			 0 ? "compatible" : "not compatible");
	DEBUG_PRINTF_VBE("\tRAMDAC: %s\n",
			 (info.capabilities & 0x4) ==
			 0 ? "normal" : "use blank bit in Function 09h");

	// argv[4] may be a pointer with enough space to return screen_info_t
	// as input, it must contain a screen_info_input_t with the following content:
	// byte[0:3] = "DDC\0" (zero-terminated signature header)
	// byte[4:5] = reserved space for the return struct... just in case we ever change
	//             the struct and don't have reserved enough memory (and let's hope the struct
	//             never gets larger than 64KB)
	// byte[6] = monitor port number for DDC requests ("only" one byte... so lets hope we never have more than 255 monitors...
	// byte[7:8] = max. screen width (OF may want to limit this)
	// byte[9] = required color depth in bpp
	if (strncmp((char *) input.signature, "DDC", 4) != 0) {
		printf
		    ("%s: Invalid input signature! expected: %s, is: %s\n",
		     __func__, "DDC", input.signature);
		return -1;
	}
	if (input.size_reserved != sizeof(screen_info_t)) {
		printf
		    ("%s: Size of return struct is wrong, required: %d, available: %d\n",
		     __func__, (int) sizeof(screen_info_t),
		     input.size_reserved);
		return -1;
	}

	vbe_ddc_info_t ddc_info;
	ddc_info.port_number = input.monitor_number;
	vbe_get_ddc_info(&ddc_info);

#if 0
	DEBUG_PRINTF_VBE("DDC: edid_tranfer_time: %d\n",
			 ddc_info.edid_transfer_time);
	DEBUG_PRINTF_VBE("DDC: ddc_level: %x\n", ddc_info.ddc_level);
	DEBUG_PRINTF_VBE("DDC: EDID:\n");
	CHECK_DBG(DEBUG_VBE) {
		dump(ddc_info.edid_block_zero,
		     sizeof(ddc_info.edid_block_zero));
	}
#endif
/* This could fail because of alignment issues, so use a longer form.
	*((u64 *) ddc_info.edid_block_zero) != (u64) 0x00FFFFFFFFFFFF00ULL
*/
	if (ddc_info.edid_block_zero[0] != 0x00 ||
	    ddc_info.edid_block_zero[1] != 0xFF ||
	    ddc_info.edid_block_zero[2] != 0xFF ||
	    ddc_info.edid_block_zero[3] != 0xFF ||
	    ddc_info.edid_block_zero[4] != 0xFF ||
	    ddc_info.edid_block_zero[5] != 0xFF ||
	    ddc_info.edid_block_zero[6] != 0xFF ||
	    ddc_info.edid_block_zero[7] != 0x00 ) {
		// invalid EDID signature... probably no monitor

		output->display_type = 0x0;
		return 0;
	} else if ((ddc_info.edid_block_zero[20] & 0x80) != 0) {
		// digital display
		output->display_type = 2;
	} else {
		// analog
		output->display_type = 1;
	}
	DEBUG_PRINTF_VBE("DDC: found display type %d\n", output->display_type);
	memcpy(output->edid_block_zero, ddc_info.edid_block_zero,
	       sizeof(ddc_info.edid_block_zero));
	i = 0;
	vbe_mode_info_t mode_info;
	vbe_mode_info_t best_mode_info;
	// initialize best_mode to 0
	memset(&best_mode_info, 0, sizeof(best_mode_info));
	while ((mode_info.video_mode = info.video_mode_list[i]) != 0xFFFF) {
		//DEBUG_PRINTF_VBE("%x: Mode: %04x\n", i, mode_info.video_mode);
		vbe_get_mode_info(&mode_info);

		// FIXME all these values are little endian!

		DEBUG_PRINTF_VBE("Video Mode 0x%04x available, %s\n",
				 mode_info.video_mode,
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x1) ==
				 0 ? "not supported" : "supported");
		DEBUG_PRINTF_VBE("\tTTY: %s\n",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x4) ==
				 0 ? "no" : "yes");
		DEBUG_PRINTF_VBE("\tMode: %s %s\n",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x8) ==
				 0 ? "monochrome" : "color",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x10) ==
				 0 ? "text" : "graphics");
		DEBUG_PRINTF_VBE("\tVGA: %s\n",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x20) ==
				 0 ? "compatible" : "not compatible");
		DEBUG_PRINTF_VBE("\tWindowed Mode: %s\n",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x40) ==
				 0 ? "yes" : "no");
		DEBUG_PRINTF_VBE("\tFramebuffer: %s\n",
				 (le16_to_cpu(mode_info.vesa.mode_attributes) & 0x80) ==
				 0 ? "no" : "yes");
		DEBUG_PRINTF_VBE("\tResolution: %dx%d\n",
				 le16_to_cpu(mode_info.vesa.x_resolution),
				 le16_to_cpu(mode_info.vesa.y_resolution));
		DEBUG_PRINTF_VBE("\tChar Size: %dx%d\n",
				 mode_info.vesa.x_charsize, mode_info.vesa.y_charsize);
		DEBUG_PRINTF_VBE("\tColor Depth: %dbpp\n",
				 mode_info.vesa.bits_per_pixel);
		DEBUG_PRINTF_VBE("\tMemory Model: 0x%x\n",
				 mode_info.vesa.memory_model);
		DEBUG_PRINTF_VBE("\tFramebuffer Offset: %08x\n",
				 le32_to_cpu(mode_info.vesa.phys_base_ptr));

		if ((mode_info.vesa.bits_per_pixel == input.color_depth)
		    && (le16_to_cpu(mode_info.vesa.x_resolution) <= input.max_screen_width)
		    && ((le16_to_cpu(mode_info.vesa.mode_attributes) & 0x80) != 0)	// framebuffer mode
		    && ((le16_to_cpu(mode_info.vesa.mode_attributes) & 0x10) != 0)	// graphics
		    && ((le16_to_cpu(mode_info.vesa.mode_attributes) & 0x8) != 0)	// color
		    && (le16_to_cpu(mode_info.vesa.x_resolution) > le16_to_cpu(best_mode_info.vesa.x_resolution)))	// better than previous best_mode
		{
			// yiiiihaah... we found a new best mode
			memcpy(&best_mode_info, &mode_info, sizeof(mode_info));
		}
		i++;
	}

	if (best_mode_info.video_mode != 0) {
		DEBUG_PRINTF_VBE
		    ("Best Video Mode found: 0x%x, %dx%d, %dbpp, framebuffer_address: 0x%x\n",
		     best_mode_info.video_mode,
		     best_mode_info.vesa.x_resolution,
		     best_mode_info.vesa.y_resolution,
		     best_mode_info.vesa.bits_per_pixel,
		     le32_to_cpu(best_mode_info.vesa.phys_base_ptr));

		//printf("Mode Info Dump:");
		//dump(best_mode_info.mode_info_block, 64);

		// set the video mode
		vbe_set_mode(&best_mode_info);

		if ((info.capabilities & 0x1) != 0) {
			// switch to 8 bit palette format
			vbe_set_palette_format(8);
		}
		// setup a palette:
		// - first 216 colors are mixed colors for each component in 6 steps
		//   (6*6*6=216)
		// - then 10 shades of the three primary colors
		// - then 10 shades of grey
		// -------
		// = 256 colors
		//
		// - finally black is color 0 and white color FF (because SLOF expects it
		//   this way...)
		// this resembles the palette that the kernel/X Server seems to expect...

		u8 mixed_color_values[6] =
		    { 0xFF, 0xDA, 0xB3, 0x87, 0x54, 0x00 };
		u8 primary_color_values[10] =
		    { 0xF3, 0xE7, 0xCD, 0xC0, 0xA5, 0x96, 0x77, 0x66, 0x3F,
			0x27
		};
		u8 mc_size = sizeof(mixed_color_values);
		u8 prim_size = sizeof(primary_color_values);

		u8 curr_color_index;
		u32 curr_color;

		u8 r, g, b;
		// 216 mixed colors
		for (r = 0; r < mc_size; r++) {
			for (g = 0; g < mc_size; g++) {
				for (b = 0; b < mc_size; b++) {
					curr_color_index =
					    (r * mc_size * mc_size) +
					    (g * mc_size) + b;
					curr_color = 0;
					curr_color |= ((u32) mixed_color_values[r]) << 16;	//red value
					curr_color |= ((u32) mixed_color_values[g]) << 8;	//green value
					curr_color |= (u32) mixed_color_values[b];	//blue value
					vbe_set_color(curr_color_index,
						      curr_color);
				}
			}
		}

		// 10 shades of each primary color
		// red
		for (r = 0; r < prim_size; r++) {
			curr_color_index = mc_size * mc_size * mc_size + r;
			curr_color = ((u32) primary_color_values[r]) << 16;
			vbe_set_color(curr_color_index, curr_color);
		}
		//green
		for (g = 0; g < prim_size; g++) {
			curr_color_index =
			    mc_size * mc_size * mc_size + prim_size + g;
			curr_color = ((u32) primary_color_values[g]) << 8;
			vbe_set_color(curr_color_index, curr_color);
		}
		//blue
		for (b = 0; b < prim_size; b++) {
			curr_color_index =
			    mc_size * mc_size * mc_size + prim_size * 2 + b;
			curr_color = (u32) primary_color_values[b];
			vbe_set_color(curr_color_index, curr_color);
		}
		// 10 shades of grey
		for (i = 0; i < prim_size; i++) {
			curr_color_index =
			    mc_size * mc_size * mc_size + prim_size * 3 + i;
			curr_color = 0;
			curr_color |= ((u32) primary_color_values[i]) << 16;	//red
			curr_color |= ((u32) primary_color_values[i]) << 8;	//green
			curr_color |= ((u32) primary_color_values[i]);	//blue
			vbe_set_color(curr_color_index, curr_color);
		}

		// SLOF is using color 0x0 (black) and 0xFF (white) to draw to the screen...
		vbe_set_color(0x00, 0x00000000);
		vbe_set_color(0xFF, 0x00FFFFFF);

		output->screen_width = le16_to_cpu(best_mode_info.vesa.x_resolution);
		output->screen_height = le16_to_cpu(best_mode_info.vesa.y_resolution);
		output->screen_linebytes = le16_to_cpu(best_mode_info.vesa.bytes_per_scanline);
		output->color_depth = best_mode_info.vesa.bits_per_pixel;
		output->framebuffer_address =
		    le32_to_cpu(best_mode_info.vesa.phys_base_ptr);
	} else {
		printf("%s: No suitable video mode found!\n", __func__);
		//unset display_type...
		output->display_type = 0;
	}
	return 0;
}
#endif

vbe_mode_info_t mode_info;

void vbe_set_graphics(void)
{
	u8 rval;

	vbe_info_t info;
	rval = vbe_info(&info);
	if (rval != 0)
		return;

	DEBUG_PRINTF_VBE("VbeSignature: %s\n", info.signature);
	DEBUG_PRINTF_VBE("VbeVersion: 0x%04x\n", info.version);
	DEBUG_PRINTF_VBE("OemString: %s\n", info.oem_string_ptr);
	DEBUG_PRINTF_VBE("Capabilities:\n");
	DEBUG_PRINTF_VBE("\tDAC: %s\n",
			 (info.capabilities & 0x1) ==
			 0 ? "fixed 6bit" : "switchable 6/8bit");
	DEBUG_PRINTF_VBE("\tVGA: %s\n",
			 (info.capabilities & 0x2) ==
			 0 ? "compatible" : "not compatible");
	DEBUG_PRINTF_VBE("\tRAMDAC: %s\n",
			 (info.capabilities & 0x4) ==
			 0 ? "normal" : "use blank bit in Function 09h");

	mode_info.video_mode = (1 << 14) | CONFIG_FRAMEBUFFER_VESA_MODE;
	vbe_get_mode_info(&mode_info);
	vbe_set_mode(&mode_info);

#if CONFIG_BOOTSPLASH
	unsigned char *framebuffer =
		(unsigned char *) le32_to_cpu(mode_info.vesa.phys_base_ptr);
	DEBUG_PRINTF_VBE("FRAMEBUFFER: 0x%p\n", framebuffer);

	struct jpeg_decdata *decdata;

	/* Switching Intel IGD to 1MB video memory will break this. Who
	 * cares. */
	// int imagesize = 1024*768*2;

	unsigned char *jpeg = cbfs_boot_map_with_leak("bootsplash.jpg",
							CBFS_TYPE_BOOTSPLASH,
							NULL);
	if (!jpeg) {
		DEBUG_PRINTF_VBE("Could not find bootsplash.jpg\n");
		return;
	}
	DEBUG_PRINTF_VBE("Splash at %p ...\n", jpeg);
	dump(jpeg, 64);

	decdata = malloc(sizeof(*decdata));
	int ret = 0;
	DEBUG_PRINTF_VBE("Decompressing boot splash screen...\n");
	ret = jpeg_decode(jpeg, framebuffer, 1024, 768, 16, decdata);
	DEBUG_PRINTF_VBE("returns %x\n", ret);
#endif
}

void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
{
	framebuffer->physical_address = le32_to_cpu(mode_info.vesa.phys_base_ptr);

	framebuffer->x_resolution = le16_to_cpu(mode_info.vesa.x_resolution);
	framebuffer->y_resolution = le16_to_cpu(mode_info.vesa.y_resolution);
	framebuffer->bytes_per_line = le16_to_cpu(mode_info.vesa.bytes_per_scanline);
	framebuffer->bits_per_pixel = mode_info.vesa.bits_per_pixel;

	framebuffer->red_mask_pos = mode_info.vesa.red_mask_pos;
	framebuffer->red_mask_size = mode_info.vesa.red_mask_size;

	framebuffer->green_mask_pos = mode_info.vesa.green_mask_pos;
	framebuffer->green_mask_size = mode_info.vesa.green_mask_size;

	framebuffer->blue_mask_pos = mode_info.vesa.blue_mask_pos;
	framebuffer->blue_mask_size = mode_info.vesa.blue_mask_size;

	framebuffer->reserved_mask_pos = mode_info.vesa.reserved_mask_pos;
	framebuffer->reserved_mask_size = mode_info.vesa.reserved_mask_size;
}

void vbe_textmode_console(void)
{
	/* Wait, just a little bit more, pleeeease ;-) */
	delay(2);

	M.x86.R_EAX = 0x0003;
	runInt10();
}

#endif